I sourced a Alfa v6 in the usa, it came from Japan with transmission, struts and hubs .. $1800 delivered. There are also Alfa 164's available ,,, few and far between but if your 3 years out you will definately get a compete can for about $3,500.
BTW i think the lead time for a Lister Bell kit is a few years, check with Graig they are busy over there with a full order book.